No astronomer needs such a house! (4)

I believe the answer is:

oast

'such a house' is the definition.
(oast houses are used in brewing)

'no astronomer needs' is the wordplay.
'needs' indicates a hidden word.
'OAST' is hidden in the letters of 'no astronomer'.

(Other definitions for oast that I've seen before include "Drying house" , "Oven for hops" , "Hop drying kiln" , "Hop-kiln" , "Hop-drying kiln" .)

I've seen this clue in the Evening Standard.

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